求翻译：4. 窗框临时固定。窗框进入墙体洞口后，其上下框中线应与洞口中线对齐；窗的上下框及中横框的对称位置应用木垫块塞紧，起临时固定和定位的作用，然后调整窗的垂直度、水平度和直角度，使之在规定公差范围内。是什么意思？

(4) temporary window frame fixed. Window frame into the wall hole, its upper and lower box line should be plugged with the hole center line alignment; symmetrical position of the windows of the upper and lower frame and horizontal frame applications wooden pad, since the role of temporary fixation a